Jan 7, 2011 #1 mariopar Industrial Jul 21, 2010 1 It is correct to use, for sizes> 2 1/2", welded connections for piping and fittings? Thanks
Jan 10, 2011 #2 TXStructural Structural Jan 10, 2007 1,033 Consult NFPA 13. Most sprinkler installers will use grooved fittings, such as: http://www.vikinggroupinc.com/en/products/489/531 Upvote 0 Downvote
Consult NFPA 13. Most sprinkler installers will use grooved fittings, such as: http://www.vikinggroupinc.com/en/products/489/531
